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EP1453212A2 - Elektronisches Gerät und Systemsteuerungsverfahren des Geräts - Google Patents

Elektronisches Gerät und Systemsteuerungsverfahren des Geräts Download PDF

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Publication number
EP1453212A2
EP1453212A2 EP04002587A EP04002587A EP1453212A2 EP 1453212 A2 EP1453212 A2 EP 1453212A2 EP 04002587 A EP04002587 A EP 04002587A EP 04002587 A EP04002587 A EP 04002587A EP 1453212 A2 EP1453212 A2 EP 1453212A2
Authority
EP
European Patent Office
Prior art keywords
battery
sound quality
output level
audio data
electronic apparatus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04002587A
Other languages
English (en)
French (fr)
Other versions
EP1453212A3 (de
Inventor
Yuasa Tomokazu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Publication of EP1453212A2 publication Critical patent/EP1453212A2/de
Publication of EP1453212A3 publication Critical patent/EP1453212A3/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • H04W52/0277—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof according to available power supply, e.g. switching off when a low battery condition is detected
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to an electronic apparatus which can be battery-driven and which is used for radio communications with another apparatus.
  • the present invention also relates to a system control method for the electronic apparatus.
  • Bluetooth(R) is drawing attention as a radio communication technology.
  • Bluetooth(R) is a low-cost, low-power and short-range radio communication technology suitable for mobile apparatuses. It is used for connecting mobile information apparatuses owned by individual users. Since the apparatuses are connected in a wireless way, their connection is free and easy in comparison with the case where they are connected by means of physical lines.
  • the Bluetooth(R) standards include parts called profiles each of which is adapted for one application.
  • the profiles concerning headsets include Advanced Audio Distribution Profile (A2DP) and Audio Video Remote Control Profile (AVRCP).
  • A2DP provides a function of connecting headsets to portable music players and executing streaming of audio data (such as data on music) for the purpose of reproducing the data.
  • AVRCP provides a function of remote-controlling of portable music players or the like.
  • a headset is an electronic apparatus that is independent from a portable music player and must therefore be driven on a battery. Hence, the system control of the headset has to be based on the remaining battery capacity.
  • Jpn. Pat. Appln. KOKAI Publication No. 2002-290320 discloses a Bluetooth(R) system wherein a mobile telephone and a handset are connected in a wireless manner. When one of these two detects that its battery is running short of capacity, it informs the other that it will enter into a power OFF mode or a sleep mode.
  • Jpn. Pat. Appln. KOKAI Publication No. 2002-290320 an ordinary operation is continued until the detection of the exhausted state of the battery.
  • some users may think that a long operation time is more important than the quality of sound.
  • a desirable system control may be to place a higher priority on the function when the remaining battery capacity is sufficient and on the power saving when the remaining battery becomes lower than a predetermined value.
  • Such a system control was impossible in the case of the invention of KOKAI Publication No. 2002-290320.
  • the present invention has been made in consideration of the above circumstances, and the object of the invention is to provide an electronic device and a system control method which enables a long continuous operation time when driven on a battery.
  • an electronic apparatus which can be driven by a battery and is configured to perform radio communications with another apparatus, characterized by comprises battery capacity detector for detecting a remaining capacity of the battery, a radio signal transmitter for transmitting a radio signal at one of a first output level and a second output level lower than the first output level, and a control device for switching the output level of the radio signal transmitted by the radio signal transmitter from the first output level to the second output level, when the remaining capacity of the battery detected by the battery capacity detector becomes lower than a predetermined value.
  • an electronic apparatus which can be powered by a battery and is configured to perform radio communications with another apparatus, characterized by comprising: a battery capacity detector for detecting a remaining capacity of the battery; an audio data reproduction device for reproducing audio data with one of first sound quality and second sound quality lower than the first sound quality; and a control device for switching the sound quality of the audio data reproduced by the audio data reproduction device from the first sound quality to the second sound quality, when the remaining capacity of the battery detected by the battery capacity detector becomes lower than a predetermined value.
  • a system control method for an electronic apparatus which can be driven by a battery and comprises a radio signal transmitter for transmitting a radio signal at one of a first output level and a second output level lower than the first output level
  • the system control method characterized by comprising the steps of: detecting a remaining capacity of the battery; and switching the output level of the radio signal transmitted by the radio signal transmitter from the first output level to the second output level, when the remaining capacity of the battery detected in the battery capacity detection step becomes lower than a predetermined value.
  • a system control method for an electronic apparatus which can be powered by a battery and comprises an audio data reproduction device for reproducing audio data with one of first sound quality and second sound quality lower than the first sound quality
  • the system control method characterized by comprising the steps of: detecting a remaining capacity of the battery; and switching the sound quality of the audio data reproduced by the audio data reproduction device from the first sound quality to the second sound quality, when the remaining capacity of the battery detected in the battery capacity detection step becomes lower than a predetermined value.
  • control according to the present invention enables a long continuous operation time in a battery driving mode.
  • FIG. 1 shows an electronic apparatus which is according to one embodiment of the present invention and a radio communication system which uses that electronic apparatus.
  • the electronic apparatus is specifically a headset wearable on the head of a user and provided with a radio communication function.
  • the headset 1 performs radio communications that conform to the Bluetooth(R) standards. This means that the headset 1 can communicate with various apparatuses as long as these apparatuses have radio communication functions that conform to the Bluetooth(R) standards.
  • the radio communication system is a master-slave system wherein a master is connected to slaves by wireless and performs radio communications with each of them.
  • the headset 1 is provided with both the Sink function of Advanced Audio Distribution Profile (A2DP) and the CT function of Audio Video Remote Control Profile (AVRCP).
  • A2DP Advanced Audio Distribution Profile
  • AVRCP Audio Video Remote Control Profile
  • the Sink function of A2DP is a function that allows the headset 1 to serve as an apparatus to which audio data (e.g., music data) is transferred for streaming.
  • the audio data is received as radio signals and simultaneously reproduced.
  • the CT function of AVRCP is a function that allows the headset 1 to serve as a controlling apparatus in remote control. Owing to this function, the headset 1 transmits a remote control signal (which is a radio signal) to an apparatus to be controlled.
  • a remote control signal which is a radio signal
  • headset 1 performs radio communications with an audio player 2 having both the Source function of A2DP and the TG function of AVRCP.
  • the Source function of A2DP is a function that allows the audio player 2 to serve as a device which transfers audio data (e.g., music data) for streaming.
  • the audio data is transmitted as radio signals.
  • the audio player 2 transmits music data to the headset 1 through the wireless connection (link) established for A2DP.
  • the TG function of AVRCP is a function that allows the audio player 2 to serve as a controlled device in remote control.
  • a remote control signal (which is a radio signal) transmitted from the controlling device, the audio player 2 starts or stops streaming.
  • the headset 1 incorporates antenna 108 used for transmitting remote control signals to the audio player 2 and for receiving audio data transmitted from the audio player 2.
  • the audio player 2 incorporates an antenna 204 used for transmitting audio data to the headset 1 and for receiving remote control signals transmitted from the audio player 2.
  • FIG. 2 illustrates the configuration of the headset 1.
  • the headset 1 comprises a central processing controller 100, an automatic battery detector 101 for detecting remaining battery capacity, an interface unit 102, an environment setting unit 103, a data buffer 104, a D/A conversion amplifier circuit 105, an output device 106, a radio communication device 107, and an antenna 108.
  • the central processing controller 100 is a processor configured to control the operation of the headset 1. It controls the driving of each section by running an internally stored program.
  • This program includes a routine for executing the Sink function of A2DP and a routine for executing the CT function of AVRCP.
  • the automatic battery detector 101 detects whether or not the remaining battery capacity has become lower than a predetermined value. If the remaining battery capacity is detected as being lower than the predetermined value, the automatic battery detector 101 notifies the central processing controller 100 of this state.
  • the interface unit 102 controls the on/off state of a power supply and the state of a sound volume in accordance with how a switch is operated.
  • the switch is provided at the ear pads of the headset 1.
  • the environment setting unit 103 is used for determining the operation setting of the headset 1, including the selection of an operation mode to be described later.
  • the data buffer 104 temporarily stores music data received from the audio player 2.
  • the D/A conversion amplifier circuit 105 and the output device 106 convert digital information into analog information and perform processing to output Dolby surround sound.
  • the Dolby surround sound is output from the loudspeakers built in the ear pads of the headset 1.
  • the radio communication device 107 is a device that executes the radio communications with the audio player 2 by following steps conformable to the Bluetooth(R) standards.
  • the radio communication device 107 is provided with a base band processing section and an RF section.
  • the radio communication device 107 is used for receiving audio data (such as music data) which the audio player 2 transmits as a radio signal, and for transmitting remote control signals (which are radio signals) to the audio player 2.
  • FIG. 3 illustrates the configuration of the audio player 2.
  • the audio player 2 comprises a central processing controller 200, an interface unit 201, a music data file 202, a radio communication device 203 and an antenna 204.
  • the central processing controller 200 is a processor configured to control the operation of the audio player 2. It controls the driving of each section by running an internally stored program.
  • This program includes a routine for executing the Source function of A2DP and a routine for executing the TG function of AVRCP.
  • the interface unit 201 includes a display monitor, a keyboard, a pointing device, etc. It is used for selecting audio data to be reproduced, and for instructing the start and stop of the reproduction of audio data and other modes.
  • the music data file 202 stores streams of audio data (such as music data) to be transmitted to the headset 1 for streaming.
  • the radio communication device 203 is a device that executes radio communications with the headset 1 by following steps conformable to the Bluetooth(R) standards.
  • the radio communication device 203 is provided with a base band processing section and an RF section.
  • the radio communication device 203 is used for transmitting audio data (such as music data) to the headset 1 as radio signals, and for receiving remote control signals which the headset 1 transmits as radio signals.
  • the headset 1 can receive music data which the audio player 2 transmits through the A2DP connection for streaming, and can transmit remote control signals to the audio player 2 through the AVRCP connection.
  • the headset 1 performs radio communications with the audio player 2 on the basis of Bluetooth(R). Therefore, the radio communication device 107 of the headset 1 is configured to receive radio signals by using any of the classes determined by the Bluetooth(R) technology, i.e., at any of output levels.
  • the D/A conversion amplifier circuit 105 is configured to enable switching between two modes: a mode in which outputs of the headset 1 are reproduced as 5. 1ch sound after being converted into Dolby surround sound; and a mode in which outputs of the headset 1 are reproduced as 2ch sound without conversion.
  • FIG. 4 illustrates the system configuration the D/A conversion amplifier circuit 105 incorporates for the mode switching.
  • a switch 1052 controls whether or not audio data should be supplied to a decoder 1051, which converts input audio data into Dolby sound data.
  • the radio communication device 107 of the headset 1 keeps using class 2 and the D/A conversion amplifier circuit 105 keeps executing data conversion to produce Dolby sound data.
  • the headset 1 operates in one of the four modes below, depending upon how the radio communication device 107 and the D/A conversion amplifier circuit 105 should operate. The mode selection is made by the user, and the environment setting unit 103 manages the results of selection.
  • class 2 covers a range of up to 10 meters or so when the output level is somewhere between 0.25 mW and 2.5 mW (4 dBm), and class 3 covers a range of about several meters when the output level is not more than 1 mW (0 dBm).
  • the switching from class 2 to class 3 is disadvantageous in that the wireless connection (link) between the headset 1 and the audio player 2 is likely to be degraded. Nevertheless, the power consumption can be reduced, and the continuous operation time can be lengthened.
  • the headset 1 provides the operation mode of type A for those users who want to maintain class 2 without lengthening the continuous operation time even when the battery capacity is running short, and who attach importance to high sound quality as well.
  • the headset 1 also provides three operation modes of types B, C and D for those users who want to lengthen the continuous operation time.
  • the operation mode of type B is selected, the communication mode is switched from class 2 to class 3.
  • the operation mode of type C is selected, the sound quality is degraded.
  • the operation mode of type D is selected, the communication mode is switched from class 2 to class 3 and simultaneously the sound quality is degraded.
  • FIG. 5 illustrates the operating principles underlying the system control the headset 1 executes; it is a flowchart showing how the headset 1 executes system control.
  • the central processing controller 100 of the headset 1 controls the D/A conversion amplifier circuit 105 to turn on the Dolby system.
  • the central processing controller 100 informs the radio communication device 107 that class 2 should be used as the communication mode (Step S1).
  • the central processing controller 100 monitors the automatic battery detector 101 to see whether this detector detects that the remaining battery capacity is less than the predetermined value (Step S2). If this state is detected ("YES" in Step S2), a check is made to see whether or not the operation mode is type A (Step S3).
  • the central processing controller 100 does not switch communication modes or turn off the Dolby system. Instead, the central processing controller 100 outputs warning sound (such as beeps) to inform the user that the remaining battery capacity has become lower than the predetermined value (Step S4). Where the operation mode is not type A ("NO" in Step S3), the central processing controller 100 checks whether the present operation mode is either type B or type D (Step S5).
  • the central processing controller 100 controls the radio communication device 107 to switch the communication mode from class 2 to class 3 (Step S6). In addition, the central processing controller 100 checks whether the operation mode is either type C or type D (Step S7). If this is the case ("YES" in Step S7), the central processing controller 100 controls the D/A conversion amplifier circuit 105 to turn off the Dolby system (Step S8).
  • Step S7 determines that the operation mode is neither type C nor type D ("NO" in Step S7), the central processing controller 100 outputs a warning sound to inform the user that the remaining battery capacity has become lower than the predetermined value (Step S4).
  • the headset 1 when the remaining battery capacity has become lower than the predetermined value, the headset 1 merely outputs a warning sound in the operation mode of type A, and not only outputs a warning sound but also switches communication modes in the operation mode of type B. In the operation mode of type C the headset 1 merely turns off the Dolby system, and in the operation mode of type D the headset not only turns off the Dolby system but also switches communication modes. Where the Dolby system is turned off, this acts as a warning to the user, and no particular warning sound is output.
  • the present invention can reduce the power consumption to lengthen the continuous operation time, on the basis of the user's request.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Headphones And Earphones (AREA)
  • Power Sources (AREA)
  • Telephone Function (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
EP04002587A 2003-02-28 2004-02-05 Elektronisches Gerät und Systemsteuerungsverfahren des Geräts Withdrawn EP1453212A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003053046 2003-02-28
JP2003053046A JP3906168B2 (ja) 2003-02-28 2003-02-28 電子機器および同機器のシステム制御方法

Publications (2)

Publication Number Publication Date
EP1453212A2 true EP1453212A2 (de) 2004-09-01
EP1453212A3 EP1453212A3 (de) 2004-12-01

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EP04002587A Withdrawn EP1453212A3 (de) 2003-02-28 2004-02-05 Elektronisches Gerät und Systemsteuerungsverfahren des Geräts

Country Status (4)

Country Link
US (1) US20040185821A1 (de)
EP (1) EP1453212A3 (de)
JP (1) JP3906168B2 (de)
CN (1) CN1248086C (de)

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JP5043810B2 (ja) 2007-12-26 2012-10-10 パナソニック株式会社 生体試料測定装置およびこれを備えた生体試料測定システム
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CN103220435B (zh) * 2013-03-29 2016-06-01 北京智谷睿拓技术服务有限公司 终端的信息输出方法及装置
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Cited By (7)

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Publication number Priority date Publication date Assignee Title
GB2426148A (en) * 2005-04-20 2006-11-15 Nokia Corp Hand held portable device having a plurality of modes of operation
EP2108948A1 (de) * 2007-12-12 2009-10-14 Panasonic Corporation Messgerät für biologische proben
EP2108948A4 (de) * 2007-12-12 2011-08-31 Panasonic Corp Messgerät für biologische proben
US8318096B2 (en) 2007-12-12 2012-11-27 Panasonic Corporation Biological sample measurement apparatus
WO2010102836A1 (en) * 2009-03-13 2010-09-16 St-Ericsson Sa (St-Ericsson Ltd) Process of audio data exchanges of information between a central unit and a bluetooth controller
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US9083643B2 (en) 2009-03-13 2015-07-14 St-Ericsson Sa Process of audio data exchanges of information between a central unit and a bluetooth controller

Also Published As

Publication number Publication date
CN1248086C (zh) 2006-03-29
JP2004266452A (ja) 2004-09-24
JP3906168B2 (ja) 2007-04-18
US20040185821A1 (en) 2004-09-23
EP1453212A3 (de) 2004-12-01
CN1525278A (zh) 2004-09-01

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